fix 5 more typos: incorrect "than"

(cherry picked from commit 7e2e4651d2dd5884dd3ea06fc8df4dc45ec9bfb5)

docs/ksh/faq.html

@@ -705,7 +705,7 @@ in FPATH and all of them will be added to the list of known
 functions.  Any commands placed in this file outside of function
 definitions will be invoked first.  The name of the file must be
 that of the first function you invoke.  If you have several functions
-defined in one file, than you should create a link to each of the
+defined in one file, then you should create a link to each of the
 function names that can potentially be invoked first.
 
 <DT>What are name reference variables and how are they used?<DD>

src/cmd/ksh93/nval.3

@@ -162,7 +162,7 @@ Otherwise, if \f5NV_ASSIGN\fP is specified, then the characters up
 to the first \f5=\fP or \f5+=\fP are used to find the name-value pair,
 and the characters after the \f5=\fP are used to define
 the value that will be assigned to this name-value pair.
-If \fIname\fP does not contain an \f5=\fP, than no assignment
+If \fIname\fP does not contain an \f5=\fP, then no assignment
 will be made.
 If the first identifier in \fIname\fP is a reference and is not
 preceded by a \fB.\fP,

src/cmd/ksh93/sh/macro.c

@@ -155,7 +155,7 @@ char *sh_mactry(Shell_t *shp,register char *string)
  * expansion on <str>. 
  * If <mode> greater than 1 file expansion is performed if the result 
  * yields a single pathname.
- * If <mode> negative, than expansion rules for assignment are applied.
+ * If <mode> negative, then expansion rules for assignment are applied.
  */
 char *sh_mactrim(Shell_t *shp, char *str, register int mode)
 {

src/cmd/ksh93/tests/shtests

@@ -43,8 +43,8 @@ USAGE=$'
     script names matching \b'$timesensitive$'\b are run with
     \bVMALLOC_OPTIONS\b unset.]
 [V:valgrind?Set \b--novmalloc_options\b and run the test scripts with
-    \bvalgrind\b(1) on \bksh\b. If \b$SHELL-g\b exists and is executable
+    \bvalgrind\b(1) on \bksh\b. If \b$SHELL-g\b exists and is executable,
-    than it is used instead of \b$SHELL\b.]
+    then it is used instead of \b$SHELL\b.]
 [x:trace?Enable script execution trace.]
 
 [ test.sh ... ] [ name=value ... ]

src/lib/libast/man/sfio.3

@@ -458,7 +458,7 @@ should leave \f5SF_MTSAFE\fP off and performs explicit locking with \f5sfmutex()
 This flag indicates that I/O system calls should not be resumed 
 after being interrupted by signals. It is useful for 
 aborting I/O operations on such interruptions. Note, however,
-than certain operating systems (e.g., BSD Unix systems) may automatically
+that certain operating systems (e.g., BSD Unix systems) may automatically
 resume interrupted system calls outside the scope of the library. On such systems,
 \f5SF_IOINTR\fP will be ineffective.