Differentiate assembler and assembly in documentation and comments

The language and the program that consumes the language are not the same.

configure

@@ -263,7 +263,7 @@ Advanced options (experts only):
   --enable-sram            allow use of on-chip SRAM
 
 Optimization options (experts only):
-  --disable-asm            disable all assembler optimizations
+  --disable-asm            disable all assembly optimizations
   --disable-altivec        disable AltiVec optimizations
   --disable-amd3dnow       disable 3DNow! optimizations
   --disable-amd3dnowext    disable 3DNow! extended optimizations
@@ -285,8 +285,8 @@ Optimization options (experts only):
   --disable-armv6t2        disable armv6t2 optimizations
   --disable-vfp            disable VFP optimizations
   --disable-neon           disable NEON optimizations
-  --disable-inline-asm     disable use of inline assembler
-  --disable-yasm           disable use of yasm assembler
+  --disable-inline-asm     disable use of inline assembly
+  --disable-yasm           disable use of nasm/yasm assembly
 
 Developer options (useful when working on Libav itself):
   --disable-debug          disable debugging symbols
@@ -4341,7 +4341,7 @@ elif enabled cparser; then
 elif enabled armcc; then
     add_cflags -W${armcc_opt},--diag_suppress=4343 # hardfp compat
     add_cflags -W${armcc_opt},--diag_suppress=3036 # using . as system include dir
-    # 2523: use of inline assembler is deprecated
+    # 2523: use of inline assembly is deprecated
     add_cflags -W${armcc_opt},--diag_suppress=2523
     add_cflags -W${armcc_opt},--diag_suppress=1207
     add_cflags -W${armcc_opt},--diag_suppress=1293 # assignment in condition

doc/platform.texi

@@ -52,11 +52,11 @@ unacelerated code.
 
 OS X on PowerPC or ARM (iPhone) requires a preprocessor from
 @url{git://git.libav.org/gas-preprocessor.git} to build the optimized
-assembler functions. Put the Perl script somewhere
+assembly functions. Put the Perl script somewhere
 in your PATH, Libav's configure will pick it up automatically.
 
 OS X on AMD64 and x86 requires @command{yasm} to build most of the
-optimized assembler functions @url{http://mxcl.github.com/homebrew/, Homebrew},
+optimized assembly functions @url{http://mxcl.github.com/homebrew/, Homebrew},
 @url{http://www.gentoo.org/proj/en/gentoo-alt/prefix/bootstrap-macos.xml, Gentoo Prefix}
 or @url{http://www.macports.org, MacPorts} can easily provide it.