za.e ki aĝ2.ĝu10
Spaces between the characters are unnecessary and should be removed, please.
I disagree, some characters are compounds of others, and so a space is necessary to indicate this.
See this page for examples of formatting:
http://weaveworld.org/android/sumerian/index.html
A concrete example for when a space is necessary is
𒀀𒀭 [No space: 'am3'; the character 'am3' is a compound of characters 'a' and 'an']
𒀀 𒀭 [Space: 'a' 'an']