& in PATH leads to accidental invocation

[eed3si9n]

steps

1. PATH contains &
2. run sbt on Windows

problem

accidental invocation of "MySQL".

notes

PATH=%JAVA_HOME%\bin;%PATH%

is not quoted in #111. /ht @dwijnand

[dwijnand]

From http://ss64.com/nt/set.html to solution seems to be:

-IF DEFINED JAVA_HOME SET PATH=%JAVA_HOME%\bin;%PATH%
+IF DEFINED JAVA_HOME SET "PATH=%JAVA_HOME%\bin;%PATH%"

[fommil]

+1