language check

docs/source/installation.rst

@@ -64,12 +64,12 @@ Alternatively, you can install all requirements in a directory of your preferenc
     3. mkdir /gpfs/exfel/data/scratch/<username>/<directory-name>
        pip install --target=/gpfs/exfel/data/scratch/<username>/<directory-name> -r requirements.txt .
 
-and it is important to make sure that installed requirements is in the PATH environment::
+and it is important to make sure that the installed requirements are in the PATH environment::
 
     4. PATH=/gpfs/exfel/data/scratch/<username>/<directory-name>/bin:$PATH
 
 
-After this make sure to adjust the :ref:`configuration` and settings in the xfel-calibrate
+After this make sure that you adjust the :ref:`configuration` and settings in the xfel-calibrate
 folder to match your environment.
 
 The tool-chain is then available via the::