Add replace function for characters

README.md

@@ -1328,7 +1328,7 @@ The following standard methods (defined in the [`MoreStringPackage`](#packages)
 | `index_of`   | character/sub-string to search for, start index _(optional)_ | returns the index that a certain character or sub-string occurs in the string, or -1 if not found |
 | `sub_string` | start index, length _(optional)_                             | extracts a sub-string (to the end of the string if length is not specified)                       |
 | `crop`       | start index, length _(optional)_                             | retains only a portion of the string (to the end of the string if length is not specified)        |
-| `replace`    | target sub-string, replacement string                        | replaces a sub-string with another                                                                |
+| `replace`    | target character/sub-string, replacement character/string    | replaces a sub-string with another                                                                |
 | `trim`       | _none_                                                       | trims the string of whitespace at the beginning and end                                           |
 
 ### Examples

src/packages/string_more.rs

@@ -226,6 +226,36 @@ def_package!(crate:MoreStringPackage:"Additional string utilities, including str
         },
         map,
     );
+    reg_trinary_mut(
+        lib,
+        "replace",
+        |s: &mut String, find: String, sub: char| {
+            let new_str = s.replace(&find, &sub.to_string());
+            s.clear();
+            s.push_str(&new_str);
+        },
+        map,
+    );
+    reg_trinary_mut(
+        lib,
+        "replace",
+        |s: &mut String, find: char, sub: String| {
+            let new_str = s.replace(&find.to_string(), &sub);
+            s.clear();
+            s.push_str(&new_str);
+        },
+        map,
+    );
+    reg_trinary_mut(
+        lib,
+        "replace",
+        |s: &mut String, find: char, sub: char| {
+            let new_str = s.replace(&find.to_string(), &sub.to_string());
+            s.clear();
+            s.push_str(&new_str);
+        },
+        map,
+    );
     reg_unary_mut(
         lib,
         "trim",