Update documentation for changed behavior name.

README.org

@@ -94,7 +94,7 @@ In general, you need to always define 3 variables and you can optionally add thr
     This defaults to "true". This enables support for a systray that has the features to re-set your wallpaper (Mostly useful if feh shits itself or if you want to set the correct wallpaper for a specific time of day after your device was suspended) without rerolling the wallpaper set used, a button to reroll and then re-set the wallpaper, as well as a Quit button. Disable this to save a very tiny amount of memory.
 + Optional: behavior: string
     This defaults to ~--bg-fill~. This is also the value that will be used when an invalid configuration option has been set. This supports 6 different modes, each mode has 2 possible keywords, resulting in 12 total valid keywords.
-    ~--bg~, ~pure~. What happens when feh is used with the ~--bg~ flag. Sets a wallpaper without any scaling.
+    ~--bg~, ~plain~. What happens when feh is used with the ~--bg~ flag. Sets a wallpaper without any scaling.
     ~--bg-tile~, ~tile~. Sets the wallpaper only on one monitor, the other ones get filled with black or white. Mostly useful for Xinerama setups with overlapping monitors. Equivalent to ~--bg-tile~ in feh.
     ~--bg-center~, ~center~. Sets a wallpaper with the center of the wallpaper centered on the middle of the screen. Crops edges. Equivalent to ~--bg-center~ in feh.
     ~--bg-fill~, ~fill~ (Default). Fills the whole screen with the wallpaper and zooms to preserve the original aspect ratio. Equivalent to ~--bg-fill~ in feh.

src/wallman_lib.py

@@ -75,7 +75,7 @@ class _ConfigLib:
             logger.error("There is no wallpaper behavior specified in general, defaulting to fill...")
             print("ERROR: There is no wallpaper behavior specified in general, defaulting to fill...")
 
-        human_behaviors: List[str] = ["pure", "tile", "center", "fill", "max", "scale"]
+        human_behaviors: List[str] = ["plain", "tile", "center", "fill", "max", "scale"]
         machine_behaviors: List[str] = ["--bg", "--bg-tile", "--bg-center", "--bg-fill", "--bg-max", "--bg-scale"]
         behavior: str = self.config_general.get("behavior", "--bg-fill").lower()
         if behavior not in human_behaviors and behavior not in machine_behaviors:
@@ -84,7 +84,7 @@ class _ConfigLib:
 
         if behavior not in machine_behaviors:
             match behavior:
-                case "pure":
+                case "plain":
                     behavior = "--bg"
                 case "tile":
                     behavior = "--bg-tile"