fix typo double space

Author: lebmich

content/module-reference/utility-modules/lighttable/history-stack.md

@@ -45,7 +45,7 @@ paste
 : Paste all items of a copied history stack onto all selected images.
 
 mode
-: This setting defines how the paste actions behave when applied to an image that already has a history stack. In simple terms the “overwrite” mode deletes the previous history stack before pasting, whereas “append”  concatenates the two history stacks together.
+: This setting defines how the paste actions behave when applied to an image that already has a history stack. In simple terms the “overwrite” mode deletes the previous history stack before pasting, whereas “append” concatenates the two history stacks together.
 
 : A copied history stack can have multiple entries of the same module (with the same name or different names) and pasting behaves differently for these entries in append and overwrite modes. 
 

content/module-reference/utility-modules/shared/collections.md

@@ -8,7 +8,7 @@ view: lighttable, tethering, map
 
 Filter the images shown in the lighttable view and filmstrip panel using image attributes. This set of filtered images is known as a _collection_.
 
-Importing images into darktable stores information about them (filename, path, Exif data, data from XMP sidecar files etc.) in darktable's library database. A collection may be  defined by applying filtering rules to these attributes, thus creating a subset of images to display in the lighttable view and the filmstrip module.
+Importing images into darktable stores information about them (filename, path, Exif data, data from XMP sidecar files etc.) in darktable's library database. A collection may be defined by applying filtering rules to these attributes, thus creating a subset of images to display in the lighttable view and the filmstrip module.
 
 The default collection is based on the _film roll_ attribute and displays all images of the last imported or selected film roll.