Misc small lispref fixes.

Misc small lispref fixes.

* windows.texi (Displaying Buffers): pop-to-buffer is not a command.

* text.texi (Parsing HTML): Update for function name changes.

* syntax.texi (Syntax Flags): Small fix.

* keymaps.texi (Active Keymaps): Typo fix.
(Changing Key Bindings): Grammar fix.

* frames.texi (Minibuffers and Frames): Grammar fix.
(Window System Selections): x-select-enable-clipboard now defaults to t.

* customize.texi (Common Keywords):
* display.texi (Abstract Display):
* modes.texi (Auto-Indentation):
* nonascii.texi (Converting Representations): Typo fixes.

* control.texi (Examples of Catch): Call it "goto" not "go to".