Fix many spelling errors and word repetitions (#188)

Many of the errors fixed in this commit are word repetitions
such as 'the the' and minor spelling errors. One formatting
error in the ksh man page has also been fixed.

src/lib/libast/man/aso.3

@@ -303,7 +303,7 @@ closes the current method (releasing its resources),
 temporarily instantiates the default method
 (either \f5ASO_INTRINSIC\fP if available or \f5AS_SIGNAL\fP otherwise),
 and initializes \f5meth\fP and instantiates it as the new method.
-If \f5disc\fP is \f50\fP the the global discipline is not modified.
+If \f5disc\fP is \f50\fP then the global discipline is not modified.
 If \f5meth\fP is \f50\fP then \f51\fP is returned if \f5asoinit()\fP has
 already been called to initialize a method, otherwise \f50\fP is returned.
 If \f5meth->lockf\fP is \f50\fP and \f5(meth->type & ASO_INTRINSIC) != 0\fP

src/lib/libast/misc/optget.c

@@ -176,7 +176,7 @@ static unsigned char	map[UCHAR_MAX];
 
 static Optstate_t	state;
 
-#if 0 /* #if !_PACKAGE_astsa  // this somehow corrupts "Or:" usage mesages, e.g. in 'typeset -\?' */
+#if 0 /* #if !_PACKAGE_astsa  // this somehow corrupts "Or:" usage messages, e.g. in 'typeset -\?' */
 
 #define ID		ast.id
 

src/lib/libast/uwin/crypt.c

@@ -675,7 +675,7 @@ static int des_setkey(register const char *key) {
 
 /*
  * Encrypt (or decrypt if num_iter < 0) the 8 chars at "in" with abs(num_iter)
- * iterations of DES, using the the given 24-bit salt and the pre-computed key
+ * iterations of DES, using the given 24-bit salt and the pre-computed key
  * schedule, and store the resulting 8 chars at "out" (in == out is permitted).
  *
  * NOTE: the performance of this routine is critically dependent on your

src/lib/libast/uwin/random.c

@@ -100,7 +100,7 @@ extern long int	random();
 
 
 /* For each of the currently supported random number generators, we have a
-   break value on the amount of state information (you need at least thi
+   break value on the amount of state information (you need at least the
    bytes of state info to support this random number generator), a degree for
    the polynomial (actually a trinomial) that the R.N.G. is based on, and
    separation between the two lower order coefficients of the trinomial.  */