rename test file

":" is not allowed in a file name on Windows.
put the racket version number in the title bar for the splash screen
Documentation for polymorphic matrix functions
Move define-inline to racket/performance-hint.

Move begin-encourage-inline to racket/private for dependencies.
Documentation on basic matrix operations and matrix-qr.
Exported `matrix-basis-cos-angle' with a contractable type
Documentation for inner product space operations
Fix fixnum comparisons to prove more bounds.
added docs on requiring planet2 modules
fixed a @file-is mistake, race?
Fix doc typos
bundle script: fixes for "README" munging
planet2 docs: move and tweak expanation of package-library `require'
add a checkbox to disable online expansion in the preferences dialog

(it controls the same state as clicking in the circle in
the bottom right corner of the drracket window)
More matrix documentation
clean up autosave a little

guard more of the filesystem manipulations with
handlers and log errors instead of letting them
be raised and show up as internal errors

related to PR 13403
adjust the framework to avoid
calling the error-display-handler when reporting
problems saving files

closes PR 13403
Merge branch 'master' of https://github.com/plt/racket