Adding more details for mutation error messages with scalar/uid type mismatch

[prashant-shahi]

Fixes dgraph-io/dgraph-js#61

• Adding quotes around the predicate name
• Adding edge in the error message

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This change is 

[campoy]

Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @manishrjain and @prashant-shahi)

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worker/mutation.go, line 352 at r1 (raw file):

"%s"

You should use %q instead, that will add the quotes and escape any special characters.

[prashant-shahi]

Reviewable status: 0 of 1 files reviewed, 1 unresolved discussion (waiting on @campoy and @manishrjain)

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worker/mutation.go, line 352 at r1 (raw file):

Previously, campoy (Francesc Campoy) wrote…

"%s"

You should use %q instead, that will add the quotes and escape any special characters.

Done.