started writing lexer after making string lib

string/docs/classify/is_alnum.md

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+# string_IsAlnum
+Returns true if the given `string` is alphanumeric.
+
+## Arguments
+- str (string): the string to check.
+
+## Returns
+isAlnum (bool): returns `true` if `string` is alphanumeric, otherwise `false`.
+
+## Example
+### Ground
+```python
+call !string_IsAlnum "abc123" &isAlnum
+println $isAlnum # true
+
+call !string_IsAlnum "@$!ffasdf" &isAlnum
+println $isAlnum # false
+
+call !string_IsAlnum "1234" &isAlnum
+println $isAlnum # true
+
+call !string_IsAlnum "_" &isAlnum
+println $isAlnum # false
+```

string/docs/classify/is_alpha.md

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+# string_IsAlpha
+Returns true if the given `string` is only the letters a-Z.
+
+## Arguments
+- str (string): the string to check.
+
+## Returns
+isAlpha (bool): returns `true` if `string` is only the letters a-Z, otherwise `false`.
+
+## Example
+### Ground
+```python
+call !string_IsAlpha "abcABC" &isAlpha
+println $isAlpha # true
+
+call !string_IsAlpha "123" &isAlpha
+println $isAlpha # false
+
+call !string_IsAlpha "abc_$@" &isAlpha
+println $isAlpha # false
+
+call !string_IsAlpha "aAbBcCdDeEfF" &isAlpha
+println $isAlpha # true
+```

string/docs/classify/is_digit copy.md

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+# string_IsAlpha
+Returns true if the given `string` is only numbers.
+
+## Arguments
+- str (string): the string to check.
+
+## Returns
+isAlpha (bool): returns `true` if `string` is only numbers, otherwise `false`.
+
+## Example
+### Ground
+```python
+call !string_IsAlpha "65535" &isAlpha
+println $isAlpha # true
+
+call !string_IsAlpha "$!@/_ffff" &isAlpha
+println $isAlpha # false
+
+call !string_IsAlpha "1234" &isAlpha
+println $isAlpha # true
+
+call !string_IsAlpha "abcd123" &isAlpha
+println $isAlpha # false
+```

string/docs/classify/is_space.md

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+# string_IsSpace
+Returns true if the given `string` is whitespace.
+
+## Arguments
+- str (string): the string to check.
+
+## Returns
+isAlpha (bool): returns `true` if `string` is whitespace, otherwise `false`.
+
+## Example
+### Ground
+```python
+call !string_IsAlpha "    " &isAlpha
+println $isAlpha # true
+
+call !string_IsAlpha " " &isAlpha
+println $isAlpha # true
+
+call !string_IsAlpha "abc_def" &isAlpha
+println $isAlpha # false
+
+call !string_IsAlpha "   a" &isAlpha
+println $isAlpha # false
+```