Fixed minor typos

docs/books/crexx_programming_guide/Building_cRexx.md

@@ -163,7 +163,7 @@ directory that is already on the `PATH`.
 
 ### Production and debug builds
 
-Production builds are optimized, while debug builds are slower in exection time but deliver support for the analysis and debugging of problems in the code. The standard distribution is an optimized production build, while a debug build can be produced with the Debug CMake build option.
+Production builds are optimized, while debug builds are slower in execution time but deliver support for the analysis and debugging of problems in the code. The standard distribution is an optimized production build, while a debug build can be produced with the Debug CMake build option.
 
 | Name    | Function                                        |
 |---------|-------------------------------------------------|

docs/books/crexx_programming_guide/rxdas.md

@@ -94,7 +94,7 @@ l7doend:
 ```
 
 The assembler produces an 'rxbin' file from that.
-What follows is the dissassembly from this 'rxbin' file.
+What follows is the disassembly from this 'rxbin' file.
 
 ```rxas <!--sumloop.disasm-->
 * MODULE - sumLoop1000

docs/books/crexx_programming_guide/rxpa.md

@@ -180,5 +180,5 @@ In **bold**, the import statement loads the namespace meaning that any REXX modu
 
 * Extending the Architecture to support Address environments and variable “pool” access  
 * JSON Remote Plugin Support implementation (aka CREXXSAA)  
-* Additional Core Plugins (e.g.NCurses, SQLLite, Curl, etc)  
+* Additional Core Plugins (e.g.NCurses, SQLite, Curl, etc)  
 * Object and Decimal Support

docs/books/crexx_vm_spec/examples/dextrREGREGREG.rxas

@@ -4,7 +4,7 @@ main() .locals=6
 	/* Check r3 - should be "1.23456789" */
 	seq r0,r3,"1.23456789"
 	brt check,r0
-	say "failed coeficient"
+	say "failed coefficient"
 	say r3
 check:
 	/* Check r4 - should be 3 */