Fix typos in rustc manpage

Author: alxgnon

man/rustc.1

@@ -97,7 +97,7 @@ Set lint forbidden
 Set internal debugging options. Use "-Z help" to print available options.
 .TP
 \fB\-C\fR FLAG[=VAL], \fB\-\-codegen\fR FLAG[=VAL]
-Set a codegen-related flag to the value specifie.d Use "-C help" to print
+Set a codegen-related flag to the value specified. Use "-C help" to print
 available flags. See CODEGEN OPTIONS below
 .TP
 \fB\-v\fR, \fB\-\-version\fR
@@ -119,7 +119,7 @@ is invoked.
 .TP
 \fBtarget-cpu\fR=help
 Selects a target processor. If the value is 'help', then a list of available
-cpus is printed.
+CPUs is printed.
 .TP
 \fBtarget-feature\fR='+feature1 -feature2'
 A space-separated list of features to enable or disable for the target. A
@@ -132,7 +132,7 @@ cause rustc to print all known passes and exit. The passes specified are
 appended at the end of the normal pass manager.
 .TP
 \fBllvm-args\fR='-arg1 -arg2'
-A space-separted list of argument to pass through to LLVM.
+A space-separated list of arguments to pass through to LLVM.
 .TP
 \fBsave-temps\fR
 If specified, the compiler will save more files (.bc, .o, .no-opt.bc) generated