Fix some typos

snippets/capitalize.md

@@ -2,7 +2,7 @@
 
 Capitalizes the first letter of a string.
 
-Capitalizes the fist letter of the sring and then adds it with rest of the string. Omit the `lower_rest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
+Capitalizes the first letter of the string and then adds it with rest of the string. Omit the `lower_rest` parameter to keep the rest of the string intact, or set it to `true` to convert to lowercase.
 
 ```python
 def capitalize(string, lower_rest=False):

snippets/capitalize_every_word.md

@@ -2,7 +2,7 @@
 
 Capitalizes the first letter of every word in a string.
 
-Uses `str.title` to capitalize first letter of evry word in the string.
+Uses `str.title` to capitalize first letter of every word in the string.
 
 ```python
 def capitalize_every_word(string):

snippets/decapitalize.md

@@ -2,7 +2,7 @@
 
 Decapitalizes the first letter of a string.
 
-Decapitalizes the fist letter of the sring and then adds it with rest of the string. Omit the `upper_rest` parameter to keep the rest of the string intact, or set it to `true` to convert to uppercase.
+Decapitalizes the first letter of the string and then adds it with rest of the string. Omit the `upper_rest` parameter to keep the rest of the string intact, or set it to `true` to convert to uppercase.
 
 ```python
 def decapitalize(string, upper_rest=False):