Fix misspelled words

Fix misspelled words in the help file.

doc/Vdebug.txt

@@ -369,7 +369,7 @@ is the port.
 3.6 TCL/Wish set up                                           *VdebugSetUpTcl*
 
 Like Python and Ruby, Tcl and Wish have an standalone debugging tool that you 
-can use from the command line, which has again been made avilable by 
+can use from the command line, which has again been made available by 
 ActiveState.
 
 Go to http://code.activestate.com/komodo/remotedebugging/, download the Tcl 
@@ -473,7 +473,7 @@ between them. The options are shown in a sort of tab interface at the top of
 the watch window, and you can switch to a different context by pressing <enter>
 (<cr>) on the context you want, or double-clicking on it with your mouse if you
 have mouse support enabled. The currently showing context is highlighted (if
-you have syntax highlighting on) and starts with an asterix.
+you have syntax highlighting on) and starts with an asterisk (*).
 
 The watch window is also used to show the results of "eval" operations. See
 the |VdebugEval| section for more on that. After evaluating an expression you
@@ -718,7 +718,7 @@ To remove all breakpoints in one go use the command: >
 You can evaluate code snippets at the current point of execution, which can be
 used to see the result of a condition, arithmetic expressions, etc. These
 snippets are written in the language that's being debugged. There are two ways
-of evaluating expresions: you can either write them yourself
+of evaluating expressions: you can either write them yourself
 (|VdebugEvalExpression|) or use visual highlighting to select an expression from
 the source window.
 
@@ -740,7 +740,7 @@ The result is shown on the watch window. E.g: >
 4.5.2 Evaluating highlighted expressions               *VdebugEvalHighlighted*
 
 Use visual highlighting (default command "v") to select an expression that you
-want to evalute and type "<Leader>e" (leader key followed by the letter "e"). 
+want to evaluate and type "<Leader>e" (leader key followed by the letter "e"). 
 The result of the evaluation is shown on the watch window.
 
 ------------------------------------------------------------------------------
@@ -1009,7 +1009,7 @@ There are a couple of hurdles to overcome in doing this:
 
 Firstly, file paths aren't a problem. You can use the options "remote_path" and
 "local_path" to swap out sections of the file URIs to make them compatible with
-eachother.
+each other.
 
 Let's say we're debugging a file on a remote machine, and the path is
 /home/user/scripts/myscript.php. On my machine the same script is located in