Delete blank rows

[gsolomon]

How to delete blank rows? For example:

I am having a great day.

She sees the sun.

I want to change this to:

I am having a great day.
She sees the sun.

[ben_josephs]

Find what: ^\n
Replace with: [nothing]

[X] Regular expression

or, if the blank lines might contain spaces,

Find what: ^ *\n [there's a space in front of the *]
Replace with: [nothing]

[X] Regular expression

[gsolomon]

That worked perfectly. Thanks!