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| @@ -56,7 +56,7 b' class Highlight2Html(NbConvertBase):' | |||||
| 56 | if not language: |
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56 | if not language: | |
| 57 | language=self.default_language |
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57 | language=self.default_language | |
| 58 |
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58 | |||
| 59 | return _pygments_highlight(source, HtmlFormatter(), language, metadata) |
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59 | return _pygments_highlight(source if len(source) > 0 else ' ', HtmlFormatter(), language, metadata) | |
| 60 |
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60 | |||
| 61 |
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61 | |||
| 62 | class Highlight2Latex(NbConvertBase): |
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62 | class Highlight2Latex(NbConvertBase): | |
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