Tweak markdown markup again [skip ci]

changelog.md

@@ -3,23 +3,33 @@
 ## 2.7.1.0  *Dec 2014*
 
   * Add support for `base-4.8.0.0`
+
   * Tighten `SafeHaskell` bounds for GHC 7.10+
+
   * Add haddock comments on `RTLD_NEXT` and `RTLD_DEFAULT`
+
   * Deprecate function `haveRtldLocal`
+
   * Fix `getGroupEntryForID/getGroupEntryForName` on Solaris. Solaris uses
     CPP macros for required `getgrgid_r` and `getgrnam_r` functions definition
     so the fix is to change from C ABI calling convention to C API calling
     convention
+
   * Fix potential type-mismatch in `telldir`/`seekdir` FFI imports
+
   * Use CAPI FFI import for `truncate` to make sure the LFS-version is used.
+
   * `executeFile`: Fix `ENOTDIR` error for entries with non-directory
     components in `PATH` (and instead skip over non-directory `PATH`-elements)
+
   * New functions in `System.Posix.Unistd`:
      - `fileSynchronise` (aka `fsync(2)`), and
      - `fileSynchroniseDataOnly` (aka `fdatasync(2)`)
+
   * New module `System.Posix.Fcntl` providing
      - `fileAdvise` (aka `posix_fadvise(2)`), and
      - `fileAllocate` (aka `posix_fallocate(2)`)
+
   * Fix SIGINFO and SIGWINCH definitions
 
 ## 2.7.0.1  *Mar 2014*