[libc] Fix typos in documentation (#139852)

Author: kazutakahirata

libc/docs/configure.rst

@@ -33,7 +33,7 @@ to learn about the defaults for your platform and target.
 * **"general" options**
     - ``LIBC_ADD_NULL_CHECKS``: Add nullptr checks in the library's implementations to some functions for which passing nullptr is undefined behavior.
 * **"math" options**
-    - ``LIBC_CONF_FREXP_INF_NAN_EXPONENT``: The value written back to the second parameter when calling frexp/frexpf/frexpl` with `+/-Inf`/`NaN` is unspecified.  Configue an explicit exp value for Inf/NaN inputs.
+    - ``LIBC_CONF_FREXP_INF_NAN_EXPONENT``: The value written back to the second parameter when calling frexp/frexpf/frexpl` with `+/-Inf`/`NaN` is unspecified.  Configure an explicit exp value for Inf/NaN inputs.
     - ``LIBC_CONF_MATH_OPTIMIZATIONS``: Configures optimizations for math functions. Values accepted are LIBC_MATH_SKIP_ACCURATE_PASS, LIBC_MATH_SMALL_TABLES, LIBC_MATH_NO_ERRNO, LIBC_MATH_NO_EXCEPT, and LIBC_MATH_FAST.
 * **"printf" options**
     - ``LIBC_CONF_PRINTF_DISABLE_FIXED_POINT``: Disable printing fixed point values in printf and friends.

libc/docs/dev/code_style.rst

@@ -285,7 +285,7 @@ Example usage:
    }  // LIBC_NAMESPACE_DECL
 
 Having hidden visibility on the namespace ensures extern declarations in a given TU
-have known visibility and never generate GOT indirextions. The attribute guarantees
+have known visibility and never generate GOT indirections. The attribute guarantees
 this independently of global compile options and build systems.
 
 ..

libc/docs/dev/source_tree_layout.rst

@@ -22,7 +22,7 @@ directories::
         - test
         - utils
 
-Each of these directories is explained breifly below.
+Each of these directories is explained briefly below.
 
 The ``benchmarks`` directory
 ----------------------------