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@@ -49,21 +49,21 @@ interactive kernel console sessions.
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## Command Palette
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-The command palette is a part of the application object and is intended to
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+The command palette, as a part of the application object, is intended to
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be the primary way to display and execute commands in the application.
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-Many of the default extensions add commands to the command palette for actions
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-such as executing a cell on a notebook or launching a new terminal instance.
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+Many of the default extensions add new commands to the command palette to provide
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+actions such as executing a notebook cell or launching a new terminal instance.
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## Phosphor
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-Phosphor is used as the underlying architecture of JupyterLab and provides
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+The Phosphor library is used as the underlying architecture of JupyterLab and provides
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many of the low level primitives and widget structure used in the application.
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-It provides a rich set of widgets for developing desktop-like applications
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+Phosphor provides a rich set of widgets for developing desktop-like applications
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in the browser, as well as patterns and objects for writing clean,
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-well-abstracted code. The widgets in the application are primarily Phosphor
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-widgets, and Phosphor concepts like message passing and signals are used
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-throughout. Phosphor messages are a many-to-one interaction that allows
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-information like resize events to flow through the widget heirarchy in
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-the application. Phosphor signals are a one-to-many interaction that allow
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+well-abstracted code. The widgets in the application are primarily **Phosphor
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+widgets**, and Phosphor concepts, like message passing and signals, are used
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+throughout. **Phosphor messages** are a *many-to-one* interaction that allows
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+information like resize events to flow through the widget hierarchy in
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+the application. **Phosphor signals** are a *one-to-many* interaction that allow
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listeners to react to changes in an observed object.
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