docs: move tmux documentation to its own file

1 files changed, 103 insertions, 89 deletions

diff --git a/internal/textutil/textutil.go b/internal/textutil/textutil.go
index 7ef2680..1e9da3c 100644
--- a/internal/textutil/textutil.go
+++ b/internal/textutil/textutil.go
@@ -4,111 +4,125 @@ import "strings"
 
 // RenderTemplate performs simple {{var}} replacement in a template string.
 func RenderTemplate(t string, vars map[string]string) string {
-    if t == "" || len(vars) == 0 {
-        return t
-    }
-    out := t
-    for k, v := range vars {
-        out = strings.ReplaceAll(out, "{{"+k+"}}", v)
-    }
-    return out
+	if t == "" || len(vars) == 0 {
+		return t
+	}
+	out := t
+	for k, v := range vars {
+		out = strings.ReplaceAll(out, "{{"+k+"}}", v)
+	}
+	return out
 }
 
 // StripCodeFences removes surrounding Markdown triple-backtick fences.
 func StripCodeFences(s string) string {
-    t := strings.TrimSpace(s)
-    if t == "" {
-        return t
-    }
-    lines := strings.Split(t, "\n")
-    start := 0
-    for start < len(lines) && strings.TrimSpace(lines[start]) == "" {
-        start++
-    }
-    end := len(lines) - 1
-    for end >= 0 && strings.TrimSpace(lines[end]) == "" {
-        end--
-    }
-    if start >= len(lines) || end < 0 || start > end {
-        return t
-    }
-    first := strings.TrimSpace(lines[start])
-    last := strings.TrimSpace(lines[end])
-    if strings.HasPrefix(first, "```") && last == "```" && end > start {
-        inner := strings.Join(lines[start+1:end], "\n")
-        return inner
-    }
-    return t
+	t := strings.TrimSpace(s)
+	if t == "" {
+		return t
+	}
+	lines := strings.Split(t, "\n")
+	start := 0
+	for start < len(lines) && strings.TrimSpace(lines[start]) == "" {
+		start++
+	}
+	end := len(lines) - 1
+	for end >= 0 && strings.TrimSpace(lines[end]) == "" {
+		end--
+	}
+	if start >= len(lines) || end < 0 || start > end {
+		return t
+	}
+	first := strings.TrimSpace(lines[start])
+	last := strings.TrimSpace(lines[end])
+	if strings.HasPrefix(first, "```") && last == "```" && end > start {
+		inner := strings.Join(lines[start+1:end], "\n")
+		return inner
+	}
+	return t
 }
 
 // InstructionFromSelection extracts the first inline instruction and returns
 // (instruction, cleanedSelection). It detects markers on the earliest position
 // per line in precedence: strict ;text;, /* */, <!-- -->, //, #, --.
 func InstructionFromSelection(sel string) (string, string) {
-    lines := strings.Split(sel, "\n")
-    for idx, line := range lines {
-        if instr, cleaned, ok := FindFirstInstructionInLine(line); ok && strings.TrimSpace(instr) != "" {
-            lines[idx] = cleaned
-            return instr, strings.Join(lines, "\n")
-        }
-    }
-    return "", sel
+	lines := strings.Split(sel, "\n")
+	for idx, line := range lines {
+		if instr, cleaned, ok := FindFirstInstructionInLine(line); ok && strings.TrimSpace(instr) != "" {
+			lines[idx] = cleaned
+			return instr, strings.Join(lines, "\n")
+		}
+	}
+	return "", sel
 }
 
 // FindFirstInstructionInLine returns (instruction, cleaned, ok) for a single line.
 func FindFirstInstructionInLine(line string) (instr, cleaned string, ok bool) {
-    type cand struct{ start, end int; text string }
-    cands := []cand{}
-    if t, l, r, ok := FindStrictInlineTag(line); ok {
-        cands = append(cands, cand{start: l, end: r, text: t})
-    }
-    if i := strings.Index(line, "/*"); i >= 0 {
-        if j := strings.Index(line[i+2:], "*/"); j >= 0 {
-            start := i
-            end := i + 2 + j + 2
-            text := strings.TrimSpace(line[i+2 : i+2+j])
-            cands = append(cands, cand{start: start, end: end, text: text})
-        }
-    }
-    if i := strings.Index(line, "<!--"); i >= 0 {
-        if j := strings.Index(line[i+4:], "-->"); j >= 0 {
-            start := i
-            end := i + 4 + j + 3
-            text := strings.TrimSpace(line[i+4 : i+4+j])
-            cands = append(cands, cand{start: start, end: end, text: text})
-        }
-    }
-    if i := strings.Index(line, "//"); i >= 0 {
-        cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+2:])})
-    }
-    if i := strings.Index(line, "#"); i >= 0 {
-        cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+1:])})
-    }
-    if i := strings.Index(line, "--"); i >= 0 {
-        cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+2:])})
-    }
-    if len(cands) == 0 { return "", line, false }
-    best := cands[0]
-    for _, c := range cands[1:] {
-        if c.start >= 0 && (best.start < 0 || c.start < best.start) { best = c }
-    }
-    cleaned = strings.TrimRight(line[:best.start]+line[best.end:], " \t")
-    return best.text, cleaned, true
+	type cand struct {
+		start, end int
+		text       string
+	}
+	cands := []cand{}
+	if t, l, r, ok := FindStrictInlineTag(line); ok {
+		cands = append(cands, cand{start: l, end: r, text: t})
+	}
+	if i := strings.Index(line, "/*"); i >= 0 {
+		if j := strings.Index(line[i+2:], "*/"); j >= 0 {
+			start := i
+			end := i + 2 + j + 2
+			text := strings.TrimSpace(line[i+2 : i+2+j])
+			cands = append(cands, cand{start: start, end: end, text: text})
+		}
+	}
+	if i := strings.Index(line, "<!--"); i >= 0 {
+		if j := strings.Index(line[i+4:], "-->"); j >= 0 {
+			start := i
+			end := i + 4 + j + 3
+			text := strings.TrimSpace(line[i+4 : i+4+j])
+			cands = append(cands, cand{start: start, end: end, text: text})
+		}
+	}
+	if i := strings.Index(line, "//"); i >= 0 {
+		cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+2:])})
+	}
+	if i := strings.Index(line, "#"); i >= 0 {
+		cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+1:])})
+	}
+	if i := strings.Index(line, "--"); i >= 0 {
+		cands = append(cands, cand{start: i, end: len(line), text: strings.TrimSpace(line[i+2:])})
+	}
+	if len(cands) == 0 {
+		return "", line, false
+	}
+	best := cands[0]
+	for _, c := range cands[1:] {
+		if c.start >= 0 && (best.start < 0 || c.start < best.start) {
+			best = c
+		}
+	}
+	cleaned = strings.TrimRight(line[:best.start]+line[best.end:], " \t")
+	return best.text, cleaned, true
 }
 
 // FindStrictInlineTag finds ;text; with no spaces after/before semicolons.
 func FindStrictInlineTag(line string) (text string, left, right int, ok bool) {
-    for i := 0; i < len(line); i++ {
-        if line[i] != ';' { continue }
-        if i+1 < len(line) && line[i+1] == ' ' { continue }
-        for j := i + 1; j < len(line); j++ {
-            if line[j] == ';' {
-                if j-1 >= 0 && line[j-1] == ' ' { continue }
-                inner := strings.TrimSpace(line[i+1 : j])
-                if inner != "" { return inner, i, j + 1, true }
-            }
-        }
-    }
-    return "", -1, -1, false
+	for i := 0; i < len(line); i++ {
+		if line[i] != ';' {
+			continue
+		}
+		if i+1 < len(line) && line[i+1] == ' ' {
+			continue
+		}
+		for j := i + 1; j < len(line); j++ {
+			if line[j] == ';' {
+				if j-1 >= 0 && line[j-1] == ' ' {
+					continue
+				}
+				inner := strings.TrimSpace(line[i+1 : j])
+				if inner != "" {
+					return inner, i, j + 1, true
+				}
+			}
+		}
+	}
+	return "", -1, -1, false
 }
-