make in and foreach get treated as keywords

src/test/run-pass/issue-2904.rs

@@ -62,10 +62,10 @@ fn square_from_char(c: char) -> square {
     }
 }
 
-fn read_board_grid<rdr:'static + io::Reader>(in: rdr) -> ~[~[square]] {
-    let in = @in as @io::Reader;
+fn read_board_grid<rdr:'static + io::Reader>(input: rdr) -> ~[~[square]] {
+    let input = @input as @io::Reader;
     let mut grid = ~[];
-    for in.each_line |line| {
+    for input.each_line |line| {
         let mut row = ~[];
         for line.iter().advance |c| {
             row.push(square_from_char(c))

src/test/run-pass/option_addition.rs

@@ -27,11 +27,11 @@ pub fn main() {
     assert_eq!(foobar, somefoobar.get());
 }
 
-fn optint(in: int) -> Option<int> {
-    if in == 0 {
+fn optint(input: int) -> Option<int> {
+    if input == 0 {
         return None;
     }
     else {
-        return Some(in);
+        return Some(input);
     }
 }

src/test/run-pass/record-pat.rs

@@ -12,8 +12,8 @@ enum t1 { a(int), b(uint), }
 struct T2 {x: t1, y: int}
 enum t3 { c(T2, uint), }
 
-fn m(in: t3) -> int {
-    match in {
+fn m(input: t3) -> int {
+    match input {
       c(T2 {x: a(m), _}, _) => { return m; }
       c(T2 {x: b(m), y: y}, z) => { return ((m + z) as int) + y; }
     }