fix grammar errors

doc/languages-frameworks/python.md

···
     src = ./.; }
 
 Running `nix-shell` with no arguments should give you
-the environment in which the package would be build with
+the environment in which the package would be built with
 `nix-build`.
 
 Shortcut to setup environments with C headers/libraries and python packages:

nixos/modules/system/boot/loader/grub/grub.nix

···
         default = false;
         type = types.bool;
         description = ''
-          Whether GRUB should be build against libzfs.
+          Whether GRUB should be built against libzfs.
           ZFS support is only available for GRUB v2.
           This option is ignored for GRUB v1.
         '';
···
         default = false;
         type = types.bool;
         description = ''
-          Whether GRUB should be build with EFI support.
+          Whether GRUB should be built with EFI support.
           EFI support is only available for GRUB v2.
           This option is ignored for GRUB v1.
         '';

pkgs/applications/graphics/kipi-plugins/default.nix

···
 stdenv.mkDerivation rec {
   name = "kipi-plugins-1.9.0";
 
-  src = fetchurl { 
+  src = fetchurl {
     url = "mirror://sourceforge/kipi/${name}.tar.bz2";
     sha256 = "0k4k9v1rj7129n0s0i5pvv4rabx0prxqs6sca642fj95cxc6c96m";
   };
···
     homepage = http://www.kipi-plugins.org;
     inherit (kdelibs.meta) platforms;
     maintainers = with stdenv.lib.maintainers; [ viric urkud ];
-    broken = true; # it should be build from digikam sources, perhaps together
+    broken = true; # it should be built from digikam sources, perhaps together
   };
 }

pkgs/servers/firebird/default.nix

···
   # icu version missmatch may cause such error when selecting from a table:
   # "Collation unicode for character set utf8 is not installed"
 
-  # icu 3.0 can still be build easily by nix (by dropping the #elif case and
+  # icu 3.0 can still be built easily by nix (by dropping the #elif case and
   # make | make)
   icu ? null
 

pkgs/servers/sql/virtuoso/7.x.nix

···
   meta = with stdenv.lib; {
     description = "SQL/RDF database used by, e.g., KDE-nepomuk";
     homepage = http://virtuoso.openlinksw.com/dataspace/dav/wiki/Main/;
-    #configure: The current version [...] can only be build on 64bit platforms
+    #configure: The current version [...] can only be built on 64bit platforms
     platforms = [ "x86_64-linux" "x86_64-darwin" ];
     maintainers = [ maintainers.urkud ];
   };