Rename func keyword to fun

Replace the `func` language keyword with `fun` throughout: update the
scanner's string-to-token mapping, all .fy example scripts, and all
documentation files (.txt, .pod, .tex, .man, .html).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/examples/func_args_ret.fy b/examples/func_args_ret.fy
index 54088e8..2039501 100644
--- a/examples/func_args_ret.fy
+++ b/examples/func_args_ret.fy
@@ -1,13 +1,13 @@
 # Test: function named arguments, explicit ret, and multiple return values
 
 # zero-arg function with explicit return
-func answer() {
+fun answer() {
     ret 42;
 }
 assert 42 == say answer();
 
 # single-arg function — factorial with a while loop and ret
-func factorial(n) {
+fun factorial(n) {
     my result = 1;
     while n > 1 {
         result = result * n;
@@ -18,13 +18,13 @@ func factorial(n) {
 assert 120 == say factorial(5);
 
 # two-arg function
-func add(a, b) {
+fun add(a, b) {
     ret a + b;
 }
 assert 8 == say add(3, 5);
 
 # conditional return inside if
-func absval(n) {
+fun absval(n) {
     if n < 0 { ret neg n; }
     ret n;
 }
@@ -32,14 +32,14 @@ assert 5 == say absval(5);
 assert 5 == say absval(neg 5);
 
 # multiple return values — both land on the caller's stack
-func minmax(a, b) {
+fun minmax(a, b) {
     if a < b { ret a, b; }
     ret b, a;
 }
 say minmax(3, 7);
 
 # old-style zero-arg function without parens still works
-func greet {
+fun greet {
     say "hello";
 }
 greet;