Text Embedded in Displayed Equations

Text can be embedded in displayed equations (in LaTeX) by using \mbox{embedded text}. For example, one obtains

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by typing
\[ M^\bot = \{ f \in V' : f(m) = 0 \mbox{ for all } m \in M \}.\] 
Note the blank spaces before and after the words `for all' in the above example. Had we typed
\[ M^\bot = \{ f \in V' : f(m) = 0 \mbox{for all} m \in M \}.\] 
we would have obtained
[GIF Image]