refactoring: combined trimLeft and trimRight in trim

src/userinput.c

@@ -59,6 +59,11 @@ void trimRight(char *input) {
     }
 }
 
+void trim(char *input) {
+    trimLeft(input);
+    trimRight(input);
+}
+
 char *readInput() {
     if (fakeInput != NULL) {
         if (fakeInput[0] == NULL) {
@@ -88,8 +93,7 @@ char *readInput() {
     }
     while(c != '\n' && c != EOF);
     buffer[index - 1] = '\0';
-    trimLeft(buffer);
-    trimRight(buffer);
+    trim(buffer);
     return buffer;
 }