fix: apply some clang-tidy lints

src/scanner.c

@@ -59,9 +59,9 @@ static void free_stack(Stack *stack) {
   free(stack);
 }
 
-static void push(Stack *stack, char c, bool triple) {
+static void push(Stack *stack, char chr, bool triple) {
   if (stack->len >= TREE_SITTER_SERIALIZATION_BUFFER_SIZE) exit(1);
-  stack->arr[stack->len++] = triple ? (c + 1) : c;
+  stack->arr[stack->len++] = (Delimiter)(triple ? (chr + 1) : chr);
 }
 
 static Delimiter pop(Stack *stack) {
@@ -128,7 +128,6 @@ static bool scan_string_content(TSLexer *lexer, Stack *stack) {
       // otherwise, if this is the start, determine if it is an 
       // interpolated identifier.
       // otherwise, it's just string content, so continue 
-      else {
       advance(lexer);
       if (iswalpha(lexer->lookahead) || lexer->lookahead == '{') {
         // this must be a string interpolation, let's
@@ -139,7 +138,7 @@ static bool scan_string_content(TSLexer *lexer, Stack *stack) {
       mark_end(lexer);
       return true;
     } 
-    } else if (lexer->lookahead == '\\') {
+    if (lexer->lookahead == '\\') {
       // if we see a \, then this might possibly escape a dollar sign
       // in which case, we need to not defer to the interpolation 
       has_content = true;
@@ -192,20 +191,18 @@ static bool scan_string_content(TSLexer *lexer, Stack *stack) {
         }
         pop(stack);
         return true;
-      } else {
+      }
       if (has_content) {
         mark_end(lexer);
         lexer->result_symbol = STRING_CONTENT;
         return true;
-        } else {
+      }
       pop(stack);
       advance(lexer);
       mark_end(lexer);
       lexer->result_symbol = STRING_END;
       return true;
     }
-      }
-    }
     advance(lexer);
     has_content = true;
   }
@@ -262,13 +259,12 @@ static bool scan_whitespace_and_comments(TSLexer *lexer) {
 
     if (lexer->lookahead == '/') {
       return false;
-    } else {
-      return true;
     }
+    return true;
   }
 }
 
-static bool scan_for_word(TSLexer *lexer, char* word, unsigned len) {
+static bool scan_for_word(TSLexer *lexer, const char* word, unsigned len) {
     skip(lexer);
     for (unsigned i = 0; i < len; i++) {
       if (lexer->lookahead != word[i]) return false;