Fix typos in comments

Tools/clinic/libclinic/dsl_parser.py

@@ -119,7 +119,7 @@ class ParamState(enum.IntEnum):
     # Legal transitions: to LEFT_SQUARE_BEFORE or REQUIRED
     START = 0
 
-    # Left square backets before required params.
+    # Left square brackets before required params.
     LEFT_SQUARE_BEFORE = 1
 
     # In a group, before required params.

Tools/peg_generator/pegen/parser_generator.py

@@ -41,7 +41,7 @@
 
 
 class RuleCollectorVisitor(GrammarVisitor):
-    """Visitor that invokes a provieded callmaker visitor with just the NamedItem nodes"""
+    """Visitor that invokes a provided callmaker visitor with just the NamedItem nodes"""
 
     def __init__(self, rules: Dict[str, Rule], callmakervisitor: GrammarVisitor) -> None:
         self.rulses = rules

Tools/wasm/wasi-env

@@ -71,5 +71,5 @@ export CFLAGS LDFLAGS
 export PKG_CONFIG_PATH PKG_CONFIG_LIBDIR PKG_CONFIG_SYSROOT_DIR
 export PATH
 
-# no exec, it makes arvg[0] path absolute.
+# no exec, it makes argv[0] path absolute.
 "$@"