general.texi: apply minor formatting fix in the MinGW section

doc/general.texi

@@ -819,8 +819,8 @@ the FFmpeg Windows Help Forum at
 
 FFmpeg can be built to run natively on Windows using the MinGW tools. Install
 the latest versions of MSYS and MinGW from @url{http://www.mingw.org/}.
-You can find detailed installation
-instructions in the download section and the FAQ.
+You can find detailed installation instructions in the download
+section and the FAQ.
 
 FFmpeg does not build out-of-the-box with the packages the automated MinGW
 installer provides. It also requires coreutils to be installed and many other