Fix typos discovered by codespell.

AUTHORS

@@ -45,7 +45,7 @@ Authors of XZ Utils
 
     Third-party code whose authors aren't listed here:
 
-      - GNU getopt_long() in the 'lib' direcotry is included for
+      - GNU getopt_long() in the 'lib' directory is included for
         platforms that don't have a usable getopt_long().
 
       - The build system files from GNU Autoconf, GNU Automake,

NEWS

@@ -29,7 +29,7 @@ XZ Utils Release Notes
 
             * x86-64 inline assembly. This works with GCC and Clang.
 
-          The default choice can currently be overriden by setting
+          The default choice can currently be overridden by setting
           LZMA_RANGE_DECODER_CONFIG in CPPFLAGS: 0 means the basic
           version and 3 means that branchless C version.
 

src/liblzma/rangecoder/range_decoder.h

@@ -34,7 +34,7 @@
 //   0x080   matched literal
 //   0x100   direct bits
 //
-// The default can be overriden at build time by defining
+// The default can be overridden at build time by defining
 // LZMA_RANGE_DECODER_CONFIG to the desired mask.
 #ifndef LZMA_RANGE_DECODER_CONFIG
 #	if defined(__x86_64__) && (defined(__GNUC__) || defined(__clang__))
@@ -184,7 +184,7 @@ do { \
 /// Update the range decoder state and the used probability variable to
 /// match a decoded bit of 0.
 ///
-/// The x86-64 assemly uses the commented method but it seems that,
+/// The x86-64 assembly uses the commented method but it seems that,
 /// at least on x86-64, the first version is slightly faster as C code.
 #define rc_update_0(prob) \
 do { \